Computer screen with a graphical user interface for a financial system



FIG. 1 is a front view of a computer screen with a graphical user interface for a financial system showing my new design;

FIG. 2 is a front view of a second embodiment thereof; and,

FIG. 3 is a front view of a third embodiment thereof.

The broken line showing of text in FIGS. 2 and 3 form no part of the claimed design. 

CLAIM The ornamental design for a computer screen with a graphical user interface for a financial system, as shown and described. 